Nut-lock



(No Mom.)

WTIMMIS. NUT LUCK.

` No. 470,520. 4 Patented-Mar, 1892.

UNITED STATES PATENT OFFICE.

VILLIAM TIMMIS, OF XVILKINSBURG, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION fomning'part of Letters Patent No. 470,520, dated March 8,1892.

Application filed December 3, 1891. Serial No. 413.889. (No model.)

. To all whom, it may concern:

Be it known that I, WILLIAM TIMMIS, a citizen of the United States ofAmerica, residing at Vilkinsburg, in the county of Allegheny and Stateof Pennsylvania, have invented certain new and useful Improvements inNut' Locks; and I do hereby declare the following to be a full, clear,and exactdescription of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters ofreference marked thereon, which form a part of this specication.

This invention relates to improvements in nut-locks.

The object of the invention is to provide an improved lock which isadapted to hold the nut and bolt .against rotation; and it consists inthe employment of a fish-plate having a depression adjacent to theaperture through which the bolt passes, said depression graduallyincreasing in depth from one end until it meets an outwardly-projectingportion, adjacent to which is a recess as deep or deeper than thedeepest part of the depression, said fish-plate being adapted to be usedwith a spring-washer having oppositely-projecting portions on its freeends, one end forming a spring-pawl, which is adapted to engage with theratchet-teeth on the inner face of the nut-,fas will be hereinafterfully Set forth, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this speciiication, Figure1 is a perspective view of an improved nut-lock constructed inaccordance'with my invention, one of the nuts being shown locked inposition. Fig. 2 is avertical sectional view taken through the line :ro: of Fig. l, said view also showing the application of a tool employedfor compressing the spring-washer so as to release the nut. Fig. 3 is adetail perspective view of the washer. Fig. 4: is a perspective viewshowing the inner face of the nut. Fig. 5 is a perspective View showingthe construction of the base or iish plate when applied to woodensurfaces.

A refers to the base or fish plate, which is provided with an aperturea, through which the bolt is passed, said bolt being held againstadapted to project beyond the nut. 'F is provided-with a ratchet-face,the inrotation by the head thereof lying in a recess in the fish-plate,or by providing the fish-plate with lugs and the head with recesses toreceive the same. to the aperture ct is recessed orreamed out from apoint indicated by Z, the said recess increasing in depth and width inthe direction of the arrow until it reaches the lug oroutwardly-projecting portion b, the side walls of which radiate from theaperture a. This recess c may be formed in the base-plate when it iscast or forged, and it will be noted that the projection b has its faceon the same plane as the face of the base-plate. Between thecommencement of the recess c and the projection b is formed a recess d,which is fully as deep or deeper than the deepest part of the recess o.A

E designatesa helical spring-washer, the under face e of which isinclined or convex, while its outer face is fiat. This' washer has aprojection f formed on one end, which eX- tends inward and is adapted,when the parts are organized, to lie within the recess d. The oppositeend of the washer has formed thereon a rigid pawl g, and beyond the samea straight portion h, said straight portion being The nut clined portionof each tooth terminating before it reaches the point thereof, so as toprovide flat portions fi, which will bear against the flat face of thespring-washer.

I am aware that prior to my invention it has been proposed to provide anut-lock with a spring-washer having the ends bent to lie in differentplanes, one of the ends engaging with a nut having a ratchet-face andthe other with the base-plate to hold the washer and nut againstrotation, and I do not therefore claim such construction, broadly, as myinvention,the same being distinguished therefrom in that the base-platehas not been recessed and provided with a projection, nor a furtherrecess in which the end of the washer lies, and, further, in that thenut employed with such construction has notbeen-provided with flatbearingsurfaces.

In operation the bolt is passed through the objects it is desired toconnect and the headed end of the same held against rotation. The washerE is then placed over the bolt, so that The base-plate A adjacent itsend f will lie inthe depressin or recess d, and it Will be observed thatas the end fis of less Width than the recess d said end will have aslight play therein. The nut is no w placed upon the bolt and screwedhome, and the Hat portions 7l thereof will bear upon the straightV whenthis is done the nut can be turned.

One great advantage which accrues from providing a recessed of greaterWidth than the projecting portion f is that the required degree of playis given to the helical washer, so that when it is compressed by the nutit can move so as to enter the deep portion of the recess. It will alsobe noted that the shallow portion of the depression c' will hold whatmay be termed the rigid end of the helical washer securely and in asubstantially xed position, so that in some cases the projection fandrecess d may be dispensed with. By providing the recess or depression c,which gradually increases in depth and width adjacent to the aperturethrough which the bolt passes, and a helical washer constructed asshown, one end of said washer will be held by the nut in positiveengagel'nent with the fish-plate, while the other end is allowed asufficient spring movement to engage with the ratchet-face of the nut,and when the parts are locked together and it is desired to release thenut the spring end of thewasher can be depressed to spring thelocking-pawl out of engagement with the teeth ofthe nut.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The combination, in a nut-lock, of a base` plate having an aperturethrough Which the allyincreasing in depth and width therefrom` to theprojection b, a spring-Washer having flat outer face and inclined innerlfaces, said Washerbeing thickest at the portion adjacent to the aperturetherein, one end of the Washer having a projection f and a pawl on theopposite end and face, a flat portion being formed on the face of theWasher adjacent to the pawl g, and a nuthaving a ratchet-face, said nutbeing of less diameter than the Washer,`substantially as shown, and forthe purpose set forth.

2. As an improved article of manufacture, a b'ase-plate for nut-locks,having an aperture a, through which the bolt passes, and an eccentricrecess of gradually-increased depth surrounding the bolt-aperture, saiddepression also increasing in width from its commencement or narrowestpoint, for the purpose set forth.Y Y

3. In combination with a nut-lock, a springwasher constructedsubstantially as shown and provided with a iat outer face and projectionor pawl` g, a beveled or inclined inner face,a nut F,having aratchet-face the teeth of which terminate in iiat portions, adapted foruse with a base-plate'having a central aperture, and a recessed andeccentric depression c, substantially as set forth.

4. The combination, in anut-lock, of abaseplate A, having an aperturethrough which the bolt passes, a recess d, a projection b, and adepression c, the periphery of which is eocentric with the aperture a,said depression increasing in depth from the recess CZ to the projectionb, a helical spring-Washer E, having a projecting portion fand pawl g,and a nut having a ratchet-face, the parts being or` ganizedsubstantially as shown, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM TIMMIS.

Vitnesses: THos. M. BROWN, JOHN S. LAMBIE.

